#floor-control {
    width: 45px;
    border: black solid 1px;
    position: fixed;
    bottom: 50px;
    left: 50%;
    margin-left: -650px;
    z-index: 999;
    font-size: 12px;
    text-align: center;
    cursor: pointer;
}

#floor-control>li{
    box-sizing: border-box;
    width: 100%;
    height: 45px;
    border-bottom: solid 1px black;
    display: flex;
    justify-content: center;
    align-items: center;
}
#floor-control>li:hover{
    background-color: #dd0044;
}

#floor-control li:last-child {
    border: 0px;
}
#floor-control>div{
    width: 100%;
    height: 45px;
    line-height: 45px;
}
.aaa{
    background-color: #dd0044;
}